Head unit for a post hole digger



FIG. 1 is a front elevational view of a head unit for a post hole digger illustrating my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design of a head unit for a post hole digger, as shown and described. 